Valve attachment for engines.



GEORGE B. MCKINNEY,^OF BARRY, ILLINOIS.

.PATENT OFFICE.

VALVE ATTAGHMENT FOR ENGINES.

Td all whom t may concern:

Be it known that I, GEORGE B. MoKINNEY, citizen of the United States,residing at Barry, in the county of Pike and State of Illinois, haveinvented certain new and useful Improvements in Valve Attachments forEngines, of which the .following is a specification.

My invention relates to improvements in attachments for gas or gasoleneengines, and the especial object of such improvements, is to providemeans to control the intake valve so that it will not leak or admit gasto be wasted through the exhaust valve.

When a gas engine has the exhaust ort open, the intake valve, beingsupporte or held only by a weak spring is unable to withstand thesuctionof the piston' and o ens slightly thus admitting gas which is bown through the exhaust port Without being ignited and is thereforewasted. If the spring on the intake valve is made stout enou h towithstand the suction created by the plston-y while the exhaust port isopen, it would be too strong to allow the intake valve to admit theproper charge.4 My invention is designed toovercome this ditliculty andthereby save the gas which is now wasted. r In this application I haveshown my intake valve controlling attachment as ada ted to and operatedby the rod that works t e lever that opens the `exhaust ort but Ido notwish to be limited to t is .particular method of applying or operatingmy attach.- ment. v y

In the accompan ng drawing whichl forms apart of this app'cationz-Flgure 1"is an elevation showing my invention applied to thecylinder of a gas engine, a portion only of the cylinder beingd shown Fi2 is a top-plan view of the parts shown in ig. 1; Fig. 3 is a top-'planview showing'the deviceused for f connecting my invention'to eVX'falve-ope'rating rod Figs. 4, 5 and 6 are' details of parts of mydevice.

Referring to the drawing inrle'tail, A rep-j resents a .cylinder ofa gas-`o1* "gasolene en-l gine, to which is attached .in any' suitable manneran intakevalve. 51 andv an exhaust valve c which valves'may be olf anypreferred`v ;construct1'on, arrangement or operation as which the springbears and I have 'shown the'l l Specication of Letters Patent.lApplication filed February 6. 1905. Serial No. 244.364.

ve stem b provided with an ex-.

' Patented Dec. 1'7, 1907.

valve-stem c provided with an expansion coil-spring c2 and with a buttonc1 on its upper end against which the spring bears, all of which arewell known features in such devices.A

Secured to the head of the cylinder is a standard al in theA upper endof which is a pivot d1 on which is mounted a lever d one end of whichbears on the button of the valve-stem c, and the other endV is pivotallyconnected with a pin e1 in the rod-coupling e, the latter having athreaded connection with the rod e2 which is operated by the engine inany suitable or approved manner and serves, throu h the lever, tooperate the exhaust port va ve c.

Mounted on the rod e2 is a collar- F which is cylindrical in its generalform, has an open vertical slot f1 cut therein, and a vertical hole f?-drilled therethrough. A set-screw f3 has a threaded engagement with asuitable opening which extends through the collar and terminates nearthe bottom of the slot f2. A set-scrr-rwf4 has a similar engagement,with an opening which extends from the sideof the collar inwardly tothe hole f 2. The collar is mounted on the rod e2 by inserting thelatter in the, slot j and screwing up the screw f3 until its inner endimpinges firmly on the rod. In the hole f2 oi the collar I insert thevertical member or portion of the rod g and secure it by screwing up thescrew f 4 until it impin es on the rod.' The horizontal portion o? therod is arranged to extend over the c linder A and its free endterminatesnear t e intake valve stem nut b1.

'Mounted' near the free endof the rod g is a cou ling II, consistin of asmallcylindrical stee casting having drilled therethrough atright-angles to each other, two openings h1, '71.3, res ectively, and athreaded vertical opening, t e inner end of which communicates with theopening h3. AIset-screw 71,2 has a threaded engagement with the verticalopening in said coupling and the latter is attached opening h3.- A rodg1 formed with a hooked 5 to the rod g by passing the latter through thecoupling by having its straight'portion'inserted through' the openingh1, 'and the hooked portion is so arranged'las to looselzy embrace thevalve-sterrrand its's" ringand rest against the base of the nut' 1. j

From the construction above' described,it

will be apparent thatthe upward movement -of the ro'd ez'will Vbecommunicated to the 'rod g1 through-the rod` g and coupling H, andthereby increase the 'pressure of the hooked end of the rod g1 againstthe under side of said nut, while the downward movement of the rod e2will depress the rod g1 and relieve the nut of pressure except thatexerted by the spring bfi vAs the rod e2 moves upward at the same timethat extra force is needed to hold the intake valve more firmly on itsseat to withstand the suction caused by the downward stroke of thepiston-head, while the exhaust valve is open, the extra force orpressure 'is furnished as described at thel time needed, and when theexhaustvalve is being closed by the expansionI of its spring, the rod e2is movin downwardly, thus releasing pressure from t e intake valve andpermittin its spring to work normally.

l will e noted that I'have so constructed the several parts of myimproved attachment that it may be attached without changparts.

ing the engine or loosening any of the nuts or It will also be observedthat the collar F is adjustable on the rod e2, and the coupling H isadjustable on the rods g and g, thus providing for all ordinaryconditions met with indiferent sizes of engines.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

1. In ages-engine, the combination with a cylinder provided with inletvand exhaust ports and valves therefor, the stems of said valvesprojecting from the cylinder, a lever having one end bearing upon andadapted to open the exhaust valve, a reciprocating rod operating saidlever, and adjustable means rigidly connected with said rod and operatedthereby, ,for holding the inlet valve on its seat when the exhaust valveis opened.

y In a gas-engine, the combination with a cylinder provided with inletand exhaust ports and valves therefor, the stems of said valvesprojecting from the cylinder, a lever opened.

inder, a lever adapted to open the exhaust valve, a rod operating saidlever, a collar detachably and adj ustably mounted on said rod anddetachable and adjustable means connected with said collar and engagingthe stem of the intake valve whereby the latter will beheld on its seatwhen the exhaust valve is 4.' In a gas-engine, the combination with acylinder.` provided with inlet and exhaust ports and spring-held valvestherefor, the stems'of said valves proj ectingfrom the cylinder, arocking lever mounted on said cylinder and having one end bearing on thestem of theexhaust valve and adapted to depress y vthe same against thetension `of the valve sprlng, a roc connected with one end of said"lever, a collar having an open slot thereinl to receive said rod, meansfor adjusting said collar on saidy rod, an angular rod adjustablymounted in said collar, a couplinOP member adjustably mounted on saidangular rod, a

hook member secured in said coupling and adapted to hold the inlet-valveon its seat in the manner and for the purpose set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

GEORGE B. MCKINNEY.

